If official methods fail to trigger the French localization, or if you are using a version that lacks the language pack, community "Patch FR" methods involve manual file replacement. Manual File Swap ( Definitive Edition Locate the directory: .../Mafia II Definitive Edition/pc/sds_fr/text Copy the files text_credits text_default Paste and replace these into the main language folder: .../pc/sds/text Launcher Settings